Such a fistula may be the anastomosis of a natural artery and vein, a bovine graft, or a synthetic polytetrafluoroethylene (PTFE) graft. The bovine graft is taken from the bovine carotid artery and anastomosed to the vein and artery of the patient.
Definition of verify. verified. ; verifying. transitive verb. 1 : to confirm or substantiate in law by oath. 2 : to establish the truth, accuracy, or reality of verify the claim.
Validation is an act, process, or instance to support or collaborate something on a sound authoritative basis. Verification is the act or process of establishing the truth or reality of something. Qualification is an act or process to assure something complies with some condition, standard, or specific requirements.